Sudoku

	A	B	C	D
1	Year	Puzzle difficulty	N	Average # minutes spent

2	2018	Easy	52	0:04:03
3	2018	Medium	103	0:06:34
4	2018	Hard	106	0:10:49
5	2018	Evil	52	0:15:50
6	2017	Easy	52	0:04:13
7	2017	Medium	104	0:06:25
8	2017	Hard	105	0:12:08
9	2017	Evil	52	0:25:28
10	2013	Very Easy	52	0:03:38
11	2013	Easy	105	0:07:01
12	2013	Medium	104	0:10:15
13	2013	Hard	104	0:15:40
14	2012	Very Easy	49	0:04:10
15	2012	Easy	99	0:08:33
16	2012	Medium	102	0:12:37
17	2012	Hard	98	0:13:29
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